[Greasemonkey] Minor feature request: display the Greasemonkey version in the configuration pane

[Julien Couvreur]

Hi,

Maybe this tiny feature won't be useful once Greasemonkey reaches 1.0,
but right now I have different versions on different computer and it's
confusing.
It looks like the config pane might fit an "About" link, or simply "v. 5.2".

What do you think?

Thanks,
Julien